is there any book where i can know lebih about fantasi creatures like what do they like and etc ?

Try searching for buku about folklore and legends. Fairies, myths, mythology and stuff like that.
I have noticed that there are differences in jawaban to those types of pertanyaan depending on the answer source. As an example, elves atau putri duyung may have different descriptions and qualities from Celtic lore to Viking atau Eastern lore.
Hope that helps.